Racism (A prejudice against a group/persons because of there race, gender, sexual orientation, or Religion) is a common belief mostly around rural or non-free speech areas. Famous racist groups include the Ku Klux Klan, Proud Boys, and the Westboro Baptist Church.
Racism can come in many forms, which can be harassment against a marginalized group, violence, ddosing, Doxing, murder, rape, or segregation.
In the United States change
Segregation change
The United States from the start had a problem with Racism against Black persons or people of African ancestry from the Atlantic slave trade. When the African Americans finally got a degree of freedom after the Civil war, African Americans were forced to shop, eat, go to school, drink, and live in different communities then in white persons, or persons of European descent.
This continued throughout the 1920's into the 30's, 40's and 50's where African Americans waited on long lines just to vote, and even some times were denied despite the fact it was illegal to do. African Americans were also required to treat White persons as there superiors, or they would risk being beaten by anti-Black racist groups.
This gathered many outspoken African American critics such as Martin Luther King Jr., Malcolm X, Fred Hampton, Rosa Parks, and the less known Harriette Moore. They used tactics such as peaceful protest which Martin Luther King Jr. and Rosa Parks often used and is famous for, and Violence which was used a lot by Malcolm X.
After many events which caused violence, protest, and even birthed the creation of the Black panther party, Lyndon B. Johnson passed a bill that would forbid housing, school, and racial segregation. Despite the bill, unsurprisingly tensions against African American communities still continued.
Even in the 21st-century, African Americans usually work in Black communities, while White persons usually work in White communities.